ECT TESTING

ISO 3035

Ring Crush Test Standard

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Overview of ISO 3035

ISO 3035 specifies a standardized method to measure the flat crush resistance of corrugated fibreboard. This method focuses on single-faced og single-wall boards, providing a reliable measure of how fluting withstands perpendicular compressive forces.

In practical application, ISO 3035 testing allows manufacturers to verify if a corrugated board meets the minimum required crush strength, which is critical for stacked pallet shipments. A board that fails to meet the standard can result in product damage or financial losses due to crushed cartons during transport.

ISO3035
YSD-01 Knusningstester

YSD-01 Knusningstester

Importance of Mechanical Testing for Packaging

Mechanical testing evaluates how well packaging materials withstand forces such as stacking, compression, and handling. Tests like flat crush resistance provide insights into the load-bearing capacity of corrugated boards.

For instance, in a study comparing B-flute og C-flute boards, C-flute boards exhibited approximately 20% higher flat crush resistance, making them suitable for heavier products. By assessing these properties, manufacturers can reduce product damage, optimize material usage, and ensure compliance with international standards, such as ISO and ASTM packaging regulations.

Overview of Corrugated Board Structures

Different board types influence testing results and applications:

Single-faced boards:

Commonly used as protective layers in multi-packing.

Single-wall (double-faced) boards:

Standard choice for shipping cartons.

Double-wall and microflute boards:

Not covered by ISO 3035 due to unclear collapse endpoints.

For example, testing a single-faced B-flute board may yield a flat crush resistance of 2.5 kN/m, whereas a single-wall C-flute board could reach 3.5 kN/m. Such data guide engineers in choosing boards for heavy-duty packaging versus light consumer goods.

Flat Crush Tester og FCT forklaret

Purpose and Significance of ISO 3035 Testing

The main goal of ISO 3035 is to determine the compressive strength of corrugated boards under flat crush conditions. Key benefits include:

  • Ensuring boxes resist crushing during transport and storage.
  • Evaluating different board grades or fluting designs.
  • Optimizing production parameters for material efficiency.
  • Supporting quality assurance and compliance with international packaging standards.

For example, a logistics company may use ISO 3035 to compare boards under stack heights of 2 m and above, ensuring boxes on the bottom layers maintain integrity and prevent crushing of products above.

Testmetode til knusning af Oher

ISO 3035 Testing Process: Flat Crush Method

I tillæg til ECT, RCT og FCT, avanceret Knusningstestere som YSD-01 kan udføre andre vigtige tests:

  • Conditioning: Test pieces are equilibrated in a controlled atmosphere, usually 23 ± 2°C with 50 ± 5% relative humidity.
  • Placement: Pieces are centered on the lower platen.
  • Compression: Steady perpendicular force is applied until fluting collapse occurs.
  • Rate of Compression: Platens move at 12.5 mm/min ± 0.25 mm/min.
  • Measurement: Record maximum force sustained before fluting collapse.
  • Validation: Rotate samples to correct for leaning flutes and ensure consistent results.

Applicable materials include:

  • Single-faced corrugated fibreboard
  • Single-wall corrugated fibreboard (double-faced)

Boards must be free of defects such as tears or uneven fluting. Double-wall or microflute boards are excluded due to ambiguous collapse endpoints, ensuring reproducible and accurate results.

Oher Crush Testing Method​

Materials Suitable for ISO 3035 Testing

Modern Equipment for ISO 3035 Testing

Advanced instruments like the Cell Instruments YSD-01 Crush Tester offer:

  • Precise force measurement and platen control
  • Digital recording and data export
  • Compatibility with ECT og flat crush testing
  • Reproducible results for both quality control and R&D applications

In practice, using modern equipment allows engineers to automatically generate test reports, analyze trends across multiple production batches, and optimize material performance efficiently.

YSD-01 Knusningstester

Tekniske specifikationer

ISO 3035 Flat Crush Testing for Corrugated Fibreboard
Parameter Specifikation
Testområde (10±0,05) cm²
Måleområde (1-9999) S, (1-15)S, (15 ～ 300) S, (300 ～ 9999) S, kontakt til tre områder
Volumen Stort vakuum 380 ± 1 ml; lille vakuum (38 ± 1) ml
Vakuumområde I gear 50,66 kPa -> 29,33 kPa
II gear 50,66 kPa -> 48 kPa 
III gear: 50,66 kPa -> 48 kPa
Testtryk (100±2) kPa (automatisk tryk)
Dimension 380x360x465 mm
Kraft  AC 220V 50Hz

Knusningstest er uundværlig for papir- og emballageproducenter, der ønsker at sikre produkternes holdbarhed og leve op til branchens regler. Test som f.eks. ECT, RCTog FCT udgør rygraden i evalueringen af bestyrelsens præstationer, der styres af strenge standarder som f.eks. ISO 3037, TAPPI T811, ISO 3035og meget mere. Med den YSD-01 Knusningstester Fra Cell Instruments får du adgang til en komplet testløsning, der er nøjagtig, alsidig og kompatibel - og som forbedrer både kvalitetskontrollen og kundetilfredsheden.

- Cell-instrumenter

Ofte stillede spørgsmål om Crush Tester

What materials can be tested using ISO 3035?

ISO 3035 is suitable for single-faced og single-wall (double-faced) corrugated fibreboard. It is not applicable to double-wall or microflute boards because the collapse endpoint is ambiguous. Using standardized materials ensures reliable and reproducible flat crush test results, which are critical for packaging design and quality control.

Den flat crush test involves placing a sample centrally on a flat crush tester and applying a perpendicular force at a controlled rate (12.5 mm/min ± 0.25 mm/min) until the fluting collapses. The maximum force recorded represents the board’s resistance. For example, a C-flute board may withstand 320 N, while a B-flute may only reach 260 N, allowing comparisons for packaging applications.

ISO 3035 testing evaluates the compressive strength of corrugated boards, ensuring boxes withstand stacking and transport stresses. By combining results with ECT testing or ring crush test standard data, manufacturers can select optimal board grades, minimize packaging failures, and ensure consistent protection of products during shipping and storage.

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